Wood Fillers for Windows

A range of window fillers for filling gaps, cracks and holes in wooden window frames and sills in preparation for refinishing with an interior wood oil, stain or other suitable wood finish. These strong and effective wood fillers will suit any project, whether softwood or hardwood window sills, new or old wooden window frames.

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Displaying 27 products

Recommended
  5.0/5.0  (72)
A strong, fast drying two-part wood filler that can be stained.
  • 30 mins drying time
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Available in 275g, 550g, 1kg
Recommended
  4.9/5.0  (67)
The strongest two-part wood filler we know. Available in many wood shades.
  • 15 mins drying time
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Available in 750ml
Recommended
  5.0/5.0  (2)
A quick drying flexible filler for emergency and permanent repairs on small to medium areas of interior and exterior wood
  • 1 coat
  • 4 hrs drying time
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Available in 400ml
Recommended
  5.0/5.0  (1)
A tough, durable, flexible wood filler for small repairs. Suitable for interior and exterior use.
  • 2 hrs drying time
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Available in 250ml, 310ml, 500ml
  4.9/5.0  (84)
Quick spot repairs to your window frame - just scrape and fill with these wax filler sticks.
  • 2 mins drying time
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Available in 40g
  5.0/5.0  (32)
Soaks deep in to rotten timber to strengthen and reinforce softened wood.
  • 1 coat
  • 2 hrs drying time
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Available in 250ml, 500ml
  4.2/5.0  (9)
Ideal for small repairs. Suitable for interior and exterior use.
  • 2 hrs drying time
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Available in 250g, 465g, 930g
  5.0/5.0  (5)
For repairing finished interior wooden furniture. Fills small to medium holes, cracks and scratches. Quick drying and easy to use.
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Available in 50g
  4.9/5.0  (7)
A water-based, multi-purpose wood filler for interior and exterior use.
  • 2 hrs drying time
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Available in 150g
  5.0/5.0  (10)
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A high performance, 2 part wood filler for repairing damage caused by wet rot and for major joinery repairs.
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  5.0/5.0  (2)
A multipurpose UV and moisture resistant glazing sealant for interior and exterior windows. Durable, flexible and does not shrink
  • 1 coat
  • 2 hrs drying time
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Available in 290ml
  4.0/5.0  (1)
A 2-part, flexible filler for emergency and permanent repairs on large areas of interior and exterior wood
  • 1 coat
  • 16 hrs drying time
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Available in 400ml
  4.8/5.0  (3)
A very fast drying flexible filler for quick emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 1 hr drying time
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Available in 300ml
A 2-part repair resin for most types of interior and exterior wood. Ideal for use in cold weather
  • 1 coat
  • 15 hrs drying time
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Available in 400ml
  5.0/5.0  (1)
Designed for external facing glazing of doors and frames and is suitable for both wooden and metal surfaces
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Available in 1kg, 2kg
A flexible gap filler for use along skirtings, doors and window frames. Suitable for internal and external use.
  • 24 hrs drying time
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Available in 290ml
A moisture-resistant flexible filler, ideal for gaps along skirting, door and window frames in kitchens and bathrooms
  • 2 hrs drying time
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Available in 330g
  5.0/5.0  (1)
A strong and flexible wood repair filler that can be used both indoors and outside
  • 4 hrs drying time
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Available in 125ml
A strong and flexible wood repair filler that can be used both indoors and outside
  • 12 hrs drying time
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Available in 1kg
An Interior and Exterior Filler that can be applied to a multitude of surfaces
  • 48 hrs drying time
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Available in 1kg